The blowup reflects ideological divisions among Democrats between a legacy Clinton organization and liberals trying to harness the energy of millennials.
WASHINGTON — The bad blood started early.
In 2008, Neera Tanden, then a top aide on Hillary Clinton’s first presidential campaign, accompanied Mrs. Clinton to what was expected to be an easy interview at the Center for American Progress, the influential group founded by top Clinton aides. But Faiz Shakir, the chief editor of the think tank’s ThinkProgress website, asked Mrs. Clinton a question about the Iraq war, an issue dogging her candidacy because she had supported it.
Ms. Tanden responded by circling back to Mr. Shakir after the interview and, according to a person in the room, punching him in the chest.
“I didn’t slug him, I pushed him,” a still angry Ms. Tanden corrected in a recent interview.
Ms. Tanden now leads the Center for American Progress, Mr. Shakir runs Bernie Sanders’s presidential campaign and the enmity between the two camps burst into the open last weekend. Mr. Sanders, angry about a video produced by ThinkProgress that ridicules his new status as one of the millionaires he has vilified on the campaign trail, sent a scorching letter to the center’s board, accusing Ms. Tanden of “maligning my staff and supporters and belittling progressive ideas.”
The blowup is another reflection of the ideological divisions among Democrats, this time between a legacy Clinton organization and a liberal wing trying to move the party to the left to harness the energy of millennials. Mr. Sanders’s team remains convinced that the Democratic establishment worked behind the scenes to deprive him of the party’s nomination in 2016; his campaign has cast the group as beholden to corporate interests set on thwarting him in 2020.
Ms. Tanden rejected that characterization and asserted in an email to Mr. Shakir that the center shares “the goals of unity.” Jodi Enda, the editor in chief of ThinkProgress, said that her website is editorially independent and that “we don’t have a favored candidate, and we don’t have a candidate who we disfavor.”
Still, Ms. Tanden’s mother, Maya Tanden, says that her daughter “can be very aggressive.”
“She’s not going to let anyone rule over her,” she said, “and she has loyalty to Hillary because Hillary is the one who made her.”
“Those Bernie brothers are attacking her all the time, but she lets them have it, too,” Maya Tanden said. “She says Sanders got a pass” in 2016, “but he’s not getting a pass this time.”
The Center for American Progress and ThinkProgress, its sister political arm, with a $60 million combined annual budget and 320 staff members, have played an outsize role in the Democratic Party for nearly two decades. Founded in 2003 by top advisers to Bill and Hillary Clinton, the organization has sought to rebrand itself as a brain trust for the anti-Trump resistance.
Its donor rolls overlap substantially with those of the Clintons’ campaigns and foundation. The think tank has taken in millions from interests often criticized by liberals, including Wall Street financiers, big banks, Silicon Valley titans, foreign governments, defense contractors and the health care industry. Individual donors can ask to remain anonymous.
Money to the Center for American Progress from the personal foundation of the Facebook creator Mark Zuckerberg surged to $665,000 in 2018 from $15,000 in 2017, while Facebook fended off scrutiny for mishandling users’ personal data, fueling violence and providing a platform for Russian election interference.
